| 학회 |
한국재료학회 |
| 학술대회 |
2014년 봄 (05/15 ~ 05/16, 창원컨벤션센터) |
| 권호 |
20권 1호 |
| 발표분야 |
제26회 신소재 심포지엄-극한소재 심포지엄 |
| 제목 |
The Effect of ZrO2 content on Flexural strength of reaction sintered mullite-zirconia composites. |
| 초록 |
Mullite-zirconia composites with 10-50wt% ZrO2 were prepared by reaction sintering at temperatures between 1300 and 1500˚C. Sintering conditions had great influence on the microstructure of mullite-zirconia composites. The needle shaped mullite grains were formed from 1300˚C but their shape and orientation changed with increase in zirconia content. The samples sintered at 1400˚C had well developed intergrown mullite needle shaped grains for the mullite-zirconia composite samples containing 20wt% ZrO2. Flexural strength was tested on 40mm span of rectangular unpolished and unnotched specimens at room temperature, using a crosshead speed of 0.6mm/s on a force measurement equipment. Increase in mullite content in the mullite-zirconia composite is accompanied by a decrease in flexural strength. In contrast, Mullite-zirconia samples containing 90wt% mullite had better oriented mullite needles as compared to the 50wt% mullite samples. Flexural strength continuously improved with increase in zirconia content in the mullite-zirconia matrix. The maximum strength of 79MPa was obtained in the 50wt% mullite-zirconia composite which were sintered at 1400˚C for 1 hour. |
| 저자 |
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| 소속 |
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| 키워드 |
reaction sintering; mullite-zirconia composites; flexural strength
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| E-Mail |
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